Specifically, this study will aim to identify patients at risk of airflow obstruction as identified by the LFQ, the results of which will be followed for confirmation through subsequent spirometry in a subset of subjects. The LFQ will be evaluated against the spirometry results comparatively. A minimum age limit of 30 years is selected for subject participation in this study for further validation of the LFQ and to ascertain the enrollment of an adequately representative subset of subjects who may be bronchitic or asymptomatic for COPD, for comparison purposes with subjects with COPD. The study of this subject population may increase the sensitivity of COPD diagnosis and potentially provide information that could improve disease awareness and, as a consequence, possibly lead to optimization of disease management in primary care.